Saw-swage



I. P. HEDSTROM.

. SAW SWAGE.

APPLICATION FILED JUNE 28; 1920.

11,401,694. llamented Dec. 27, 1921.

JUEN I. HEDSTROM, OF BIG- RAPIDS, ,IVIICHIGAN, ASSIGNOR TO MACHINERY COMPANY 0F AMERICA, OF BIG RAPIDS, MICHIGAN, A. CORPORATION OF MICHIGAN ysaw-summa.

Application led .Tune 28,V

To all whom @'25 may concern:

Be it known that I, JOHN IYI-Inns'rRoM, a citizen of the United States of America, residing at Big Rapids, in the county` of HMecosta and State of Michigan, have invented j certain new and usefulV Improvements in Saw-Swages; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art` to which it appertains to make and use the same.

This invention relates to a saw swaging tool by means of which the teeth of saws may be swaged, the metal at the point of the tooth being upset and widened at the point and below the same on the inner side of the tooth. VMy invention has for its v primary object and purpose, the construction of a tool of this character in which the swaging die may be very readily removed at any time for inspection, changing of position and oiling. A further object of the invention is to construct a tool which comprises many novel features `of construction and operation all tending t0 a betterment of operation, endurance and effectiveness ofthe tool, one feature in particular relating to a bushing mounting for the swaging die which serves to keep the die properly positioned with reference to the remainder of the tool and hold the same in strict alinernent at all times, there being little or no wear on said bushings such that the die might become eccentric in its alinement. Various other objects and purposes than thosespeciically enumerated will appear fully and in detail as understanding of the invention is had from the following description, taken in connection with the accompanying drawing, in which,

Figure 1 is a side elevation of the swaging tool showing the same applied to a saw.

Fig. 2 is a vertical transverse section substantially on the line 22, of Fig. 1.

Fig. 3 is a section and end view substantially on the line 3 3, of Fig. 2.

Fig. 4 is an end view looking at the end. opposite to that shown in Fig. 3, and

Fig. 5 is a fragmentary vertical section on line 5 5 of Fig. 2.

Like reference characters refer to like parts in the different views of the drawing.

In the construction of the swaging tool, a central block 1 is used it being slotted upwardly from its lower side as indicated at 2. Bars 3 and 4 extend in opposite direci Specification of Letters .Patent.t A Patented D96. 27, 1921. j

1920. Serial No. 392,309.

6 are'operatively connected therewith adjacent their free ends, the samel resting on teeth 0f the saw each side of the tooth being swaged so as t0 properly hold the tool. The handle 7 is also a part of the tool and operates a gripping device for holding the tool on the saw but the same is not shown as it is old construction and no partl of the present invention. l

The swaging die comprises a rod 8 which y tions from the block 1 and'guide-bars 5 and has the major portion of its surface curved l in the are of a circle. surface is eccentric with the center or `axis of the rod and finally terminates in a fiat portion as indicated at 9.' It is apparent that when the rod is turned said eccentric The remainder of the f and flat surfaces coming against the under inner edges of Va saw tooth serve to compress and upsetthe metal and widen the same at and adjacent the point of the tooth. This swaging die rod in itself is not new, the pres-` ent invention being concerned with the novel detachable and adjustable mountingfofthe same as will now be described.

The rod is turned by a handle 10 which is 4attached to a bushing 11 interiorly formed so as t0 freely pass and receive the die rod S. The handle is attachedto the bushing and' the `bushing to the die rod by the usual binding screw, the loosening of which frees the die rod for` adjustment to a different posif tion in the bushing when desired. This bushing at its inner end is received in a recess made in the end of the block 1 in which it has bearing. The bushing is formed with an annular groove 12 around it which comes close to the outer ysurface of "saidfblock 1' when the bushing is seated in the recess. A latch lever 13 is pivotally mounted between its ends on the adjacent end of the block being formed at its lower end with a bill 14 which normally seats in the groove 12 under the action of spring 15. The outer end of 4the lever 13 may bemanually operated to disconnect the bill thereof from the bushing so as to free the same and permit removal of the die rod 8, bushing 11 and handle v10 from the tool.

A. second bushing 16 is located in the op-` posite side of the block 1 having a ange 16a which limits the insertion of the bushin@ in the opening made for it, the outer side of the Iiange being flush with the outer end of the block 1. The bushing is remov-V ably held in place by a plate l? attached by screws to the blockandlyingA over tbeliange 16a' but'havingA a central 'penin topass the die rod 8.VT

From the construction described, it is apparent that the die rod may be readily removedat any time trom the tool for an inspection ofthe die surfaces-and ifsaid'surfaces are damaged or otherwise rendered unfit for swag-ing, the position or' the rod with respect tothe bushing- 11 may be readilychanged Ybefore itisrreplaced. ln addition, the easy and vready removability of the Vdie rod 8 is very desirable as oilv should ybe applied to the die surfaces frequently in thepractical usent thevtool, and this application can Ybe-besttmade when. tlie'die rod is removed. the die rod positively`v in alinement, furnish sideor otherwise not true rit is ver-yeasy toreplace theV same or remove VJthel same for The construction is particularly practical, durable and ellicientand has been in :actual practical service long `enough vto demonstrate its complete success-- I claim.: l l. In a saw swage, the combination of a swage block, an elongated-swaging die pass` ing` through the-block` `a 'bushing mounted on the die and adapted to seat ina Yrecess in theblock in which ithas bearing, said` :bushing being provided with an annular groove around the same,` an operati-ng handle` operatively connected to the die, and ale-verpivotallymounted onthe block and normally entering the groove in the bushing to hold the bushing against detachment -from the block, said lever being` movable to free thejbushing,` and associated die for removal from theblock, substan tially as described.`

2. In a saw swage, the combination of a swage block, said 'block havingl a 'shallow recess inone side thereof, a bushing;seating,`

at oneend in and havingrbearing in the Thebushings `V1l and 16 holda large bearing` surface to take the pressure i ,aoneee ally mounted on the bloolroandtnormallyy engaging at one end 'in thel groove' in the bushing, substantially asand ffor the purposes described.

3. In a saw'swage, a swaging bloclr-liav ing an upwardly)extending slot in its under portion and a shallow cylindrical.recessviir one side, a cylindrical opening,beingmadein the `opposite side of thebushing through. to the slot, a bushing seated latone'end yin the recess, means for'detachablyconnecting the bushingqto the'bloclz, a second bushing located in said cylindrical opening, means-W for detachably securing the second bushing'. to the block, both ot said bushingspbeing rotatable with respect to the-block, an clon:-

gated,v swaging die passing freely through` both bushings, meansV to secure the die" and irst bushingin fixed relation to each other, and an operating-handle operatively. connected with the die for turning it' about its i longitudinal aXis, substantially vas `described.

il. In a saw sWage,-a swaging block='liav ing a cylindrical open1ng1.in-one` side; a`

bushing,l rotatably 1 seatedY inl the opening' a swaging die .passingl throughl the bushing,v

meansl for detachably connecting-the die with the block, an operating handle for ythe die, and a plate detacliably connected to the' block and engaging against the -end of the bushing to retain the same in* place, said plate having an openingxto pass'thefdie,`

substantially as described.

ln testimony whereof I alix my signal' ture.

Jenn r. rinnsraom 

